Why does Halobacterium pump large quantities of K+ cations into its cytoplasm from the environment? What would happen if Halobacterium did not do this?
What will be an ideal response?
Answer: Halobacterium maintains a high intracellular concentration of K+ cations so that the high quantities of Na+ cations in the environment do not diffuse into the cell. By doing this, a positive water balance is achieved, avoiding death via dehydration.
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Cardiac muscle has prolonged contraction due to a sodium induced-calcium released process into the cytoplasm of the cell. Cardiac cells can communicate through pore-like channels between cells. List the junction and the organelle involved in cardiac muscle contraction?
A. Adherens; Golgi apparatus B. Adherens; Rough ER C. Adherens; Smooth ER D. Gap; Golgi apparatus E. Gap; Rough ER F. Gap; Smooth ER
A theoretical concept that is used to understand how and why certain organisms can be sorted into discrete taxonomic groups is known as the ________.
A. endosymbiotic theory B. genotypic concept C. phylogenetic concept D. species concept
Antibiotic resistance in both MRSA and tetracycline-resistant bacteria involves regulating the expression of genes that remove antibiotics from the cell. Both types of gene regulation involve:
What will be an ideal response?
The philosophy of Intelligent Design holds that strong evidence exists for creation by a divine being because some living things have parts that are so complex and complicated that they simply couldn't have developed through evolutionary processes; they had to have been created. Intelligent Design is not a science because:
A) no complex or complicated structures exist in nature. B) most scientists don't believe in it. C) several scientists do believe in creation science. D) the idea that a deity created complex biological structures is not testable or measurable. E) scientists already know how all complex structures came to be through evolution.